Quantum computational gates with radiation free couplings


Kulik I., Hakioglu T. T. , Barone A.

EUROPEAN PHYSICAL JOURNAL B, vol.30, no.2, pp.219-226, 2002 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 2
  • Publication Date: 2002
  • Doi Number: 10.1140/epjb/e2002-00349-8
  • Title of Journal : EUROPEAN PHYSICAL JOURNAL B
  • Page Numbers: pp.219-226

Abstract

We examine a generic three level mechanism of quantum computation in which all fundamental single and double qubit quantum logic gates are operating under the effect of adiabatically controllable static (radiation free) bias couplings between the states. Under the time evolution imposed by these bias couplings the quantum state cycles between the two degenerate levels in the ground state and the quantum gates are realized by changing Hamiltonian at certain time intervals when the system collapses to a two state subspace. We propose a physical implementation of the mechanism using Aharonov-Bohm persistent-current loops in crossed electric and magnetic fields, with the output of the loop read out by using a quantum Hall effect aided mechanism.